Your website talks to your mobile app. Your app talks to your CRM. Your CRM talks to your email tool. That's what API development enables. I've been building REST APIs for over 8 years — for job portals, mobile apps, SaaS platforms, and internal tools. Secure, documented, and ready to scale.
I built the backend API for Workiley Android app (10,000+ downloads). I've integrated Stripe, PayPal, Twilio, Mailchimp, and 20+ other third-party services. If you need data to flow between systems, I can build it.
⭐ 4.9/5 from 47 clients • 20+ APIs delivered • Free consultation
Making your systems talk to each other
APIs built from scratch
Average API response time
Mobile app users served
API uptime guaranteed
API development is the backbone of modern software. When your mobile app needs data from your database — that's an API. When your website needs to process credit cards — that's an API. When your CRM needs to talk to your email marketing tool — that's an API.
Without APIs, your systems are isolated islands. With them, everything works together. I build RESTful APIs that are fast, secure, and easy for other developers to use.
From custom APIs to third-party integrations
Build from scratch. CRUD operations, authentication, filtering, pagination, sorting. Follows RESTful conventions. Returns JSON. Includes full documentation.
Request custom API →Connect your app to external services: Stripe (payments), Twilio (SMS), SendGrid (email), Google Maps, OpenAI, Slack, Salesforce, HubSpot, and hundreds more.
See integration examples →Build the server-side logic for your mobile app. User authentication, data sync, push notifications, file uploads. Works with Android, iOS, or Flutter apps.
Partner with mobile app development →JWT tokens, OAuth2, API keys, rate limiting, request validation, SQL injection protection. Your API stays secure.
Learn about API security →Interactive API documentation that developers love. Auto-generated from your code. Includes request/response examples, error codes, and test endpoints.
See documentation sample →Replace outdated, slow, or insecure APIs with modern RESTful architecture. Zero downtime migration strategies.
Discuss migration →Modern tools for modern APIs
My primary framework for REST API development. Eloquent ORM, built-in authentication, rate limiting, API resources, and excellent documentation tools.
Lightweight, event-driven APIs. Great for real-time features, WebSockets, and high-concurrency scenarios.
For data-heavy APIs, machine learning integrations, or when your team prefers Python.
MySQL, PostgreSQL, MongoDB, SQLite. Proper indexing, query optimization, and data relationships.
From requirements to deployment
What data needs to flow? Who calls the API? What authentication is needed? I document every endpoint before coding begins.
Define endpoints, request/response structures, error codes, versioning strategy. You approve the design before I write code.
I build endpoints in logical groups. You get a staging URL to test as features complete. No waiting until the end.
Unit tests, integration tests, load testing. I ensure your API handles expected traffic without breaking.
Interactive OpenAPI/Swagger docs. Your developers (or future you) will thank me.
Deploy to your server (AWS, DigitalOcean, etc.). Set up logging, error tracking, and uptime monitoring.
Case studies from actual client work
Challenge: Job portal needed a backend for Android app and website.
Solution: Laravel REST API with JWT authentication, job CRUD, application tracking, search/filters, push notifications.
Result: API handles 50,000+ requests daily. Powers both web platform and Android app (10k+ downloads). Response time: 80-120ms.
Challenge: Online store needed unified API for multiple payment providers.
Solution: Custom API integrating Stripe, PayPal, and Razorpay. Unified checkout endpoint, webhook handling, order management.
Result: $250k+ processed through API in first 6 months. Zero payment failures.
Challenge: B2B company needed website forms to sync with their Salesforce CRM.
Solution: Middleware API that receives webhook data, transforms it, and pushes to Salesforce via their REST API.
Result: 600+ hours saved per year on manual data entry.
Challenge: E-commerce site wanted ChatGPT integration for customer support.
Solution: Custom API that takes customer questions, queries OpenAI, and returns answers. Includes context from product database.
Result: 70% of support tickets automated. See AI chatbot services for more.
Connect your app to the services you already use
Stripe, PayPal, Razorpay, Square
SendGrid, Mailchimp, AWS SES, Postmark
Twilio, Vonage, WhatsApp Business API
AWS S3, Cloudinary, DigitalOcean Spaces
OpenAI GPT, Google Vision, Hugging Face
Salesforce, HubSpot, Pipedrive, Zoho
Google Maps, Mapbox, OpenStreetMap
Google Calendar, Calendly, Outlook
Don't see your service? I've integrated 50+ different third-party APIs over the years. If it has API documentation, I can integrate it.
Fixed-price or hourly — whichever makes sense for your project
$500 – $1,500
Connect your app to one third-party service (e.g., Stripe, Mailchimp, Twilio). Includes authentication, error handling, and documentation.
$2,000 – $4,000
5-10 endpoints. User authentication, CRUD operations. Perfect for mobile app backend or simple data API.
$4,000 – $10,000+
15+ endpoints, advanced filtering, real-time features, multiple integrations, admin dashboard. Full-scale API for complex applications.
💡 Not sure what you need? Let's hop on a 15-minute call. I'll ask the right questions and give you a fixed-price quote. No hourly games.
REST is simpler and more common. GraphQL gives clients more control over what data they fetch. I build both. For most projects, REST is the right choice. I'll recommend what fits your needs.
Simple integrations: 1-2 weeks. Small custom API: 3-5 weeks. Complex API: 6-12 weeks. Depends on endpoints, authentication, and integrations.
Yes. I implement JWT tokens, API keys, rate limiting, HTTPS enforcement, input validation, SQL injection protection, and security headers. Regular security updates included.
Absolutely. I provide interactive OpenAPI/Swagger documentation. Your developers (or future you) will have clear examples of every endpoint, parameter, and response.
Yes. I've built backends for Android and Flutter apps. If you need a mobile app, check my mobile app development services for a complete package.
$99/month for monitoring, security updates, and minor changes. Hosting (DigitalOcean, AWS) is separate — typically $20-100/month depending on traffic.
Yes. I can connect your API to your custom web development project or existing website. If you need the whole package (website + API), ask about bundle pricing.
Let's talk about your integration needs. I'll help you design an API that's scalable, secure, and a pleasure to use. Free 15-minute consultation.
💬 Start WhatsApp Conversation →📧 info@syntaxcrow.com | 📞 +91 9562515924